I don't agree with that analysis.
Scoot could very quickly become the 2nd best guard on the team (maybe he already is), with the same or better defense than Anfernee Simons or Shaedon Sharpe.
Scoot has a complementary skillset with Dame, much more than Anfernee Simons.
The player that doesn't make sense playing alongside Dame is Anfernee Simons, not Scoot Henderson. (if we are considering just those two players.)
I think it is a huge misconception that Scoot cannot play off the ball. He has already proven that he can. And other than three-point shooting, he can do so much than Simons can.